A Study of the Migration and Accumulation Efficiency and the Genesis of Hydrocarbon Natural Gas in the Xujiaweizi Fault Depression   总被引：1，自引：1，他引：0  

LI Jijun  LU Shuangfang  XUE Haitao  HUO Qiuli  XU Qingxia 《《地质学报》英文版》2008,82(3):629-635

In order to investigate the migration and accumulation efficiency of hydrocarbon natural gas in the Xujiaweizi fault depression, and to provide new evidence for the classification of its genesis, a source rock pyrolysis experiment in a closed system was designed and carried out. Based on this, kinetic models for describing gas generation from organic matter and carbon isotope fractionation during this process were established, calibrated and then extrapolated to geologic conditions by combining the thermal history data of the Xushen-1 Well. The results indicate that the coal measures in the Xujiaweizi fault depression are typical ＂high-efficiency gas sources＂, the natural gas generated from them has a high migration and accumulation efficiency, and consequently a large-scale natural gas accumulation occurred in the area. The highly/over matured coal measures in the Xujiaweizi fault depression generate coaliferous gas with a high δ^13C1 value （〉 -20‰） at the late stage, making the carbon isotope composition of organic alkane gases abnormally heavy. In addition, the mixing and dissipation through the caprock of natural gas can result in the negative carbon isotope sequence （δ^13C1 〉δ^13C2 〉δ^13C3 〉δ^13C4） of organic alkane gases, and the dissipation can also lead to the abnormally heavy carbon isotope composition of organic alkane gases. As for the discovery of inorganic nonhydrocarbon gas reservoirs, it can only serve as an accessorial evidence rather than a direct evidence that the hydrocarbon gas is inorganic. As a result, it needs stronger evidence to classify the hydrocarbon natural gas in the Xujiaweizi fault depression as inorganic gas.  相似文献   

二氧化碳注入煤层多用途研究   总被引：1，自引：0，他引：1  

陈润  秦勇  申建  王国玲  刘国伟 《煤田地质与勘探》2008,36(6)

为了减轻环境污染,提高煤层气产率,增加能源储备,根据煤层气地质学和生物气的基本理论,提出二氧化碳(CO2)注入煤层多种用途这一新观点。研究结果显示:煤对CO2具有很强的吸附能力,可将煤层作为CO2的储集层;煤具有优先吸附CO2而滞后吸附甲烷(CH4)的特性,向煤层注入CO2可大大提高煤层气的采收率;产甲烷菌具有利用CO2生成CH4的能力,新生成的CH4成为能源储备的有益补充。可见,CO2注入煤层不仅可有效减少温室气体的排放,强化煤层甲烷产出,而且为新能源生物CH4的生成提供了基质。  相似文献   

夜间灯光数据的区域能源消费碳排放空间化     

顾羊羊  乔旭宁  樊良新  关中美  冯德显  高亚红 《测绘科学》2017,42(2)

针对传统统计数据无法准确、客观地测量区域能源消费碳排放量并展现地理分布差异的问题,该文提出利用DMSP/OLS卫星数据稳定夜间灯光数据和能源消费数据,模拟区域碳排放空间分布,揭示区域碳排放分布特征和规律。以河南省为研究区的分析结果表明:1995—2012年河南省能源消费碳排放总量逐年增加,郑州、洛阳和新乡市的能源消费碳排放量年均增长较快,三门峡、济源市的碳排放量增长较慢;2012年各地区能源消费碳排放强度高于1995年,18年间地均碳排放强度均呈现出明显的地域分布差异规律,主要集中在郑州、洛阳和安阳市区域内。基于夜间灯光数据模拟区域能源消费碳排放具有一定的可行性,该数据能比较可靠地反映区域能源消费碳排放的时空动态变化规律。  相似文献   

利用普鲁士蓝/活性炭复合材料回收提钾后的盐湖卤水中铯          下载免费PDF全文

谢非  于业笑  屈小荣  王石军  晋冠平 《盐湖研究》2017,25(3):32-38

以亚铁氰化钾为单源前驱体,以活性炭为载体,采用超声辅助均匀沉淀法,制备了普鲁士蓝/活性炭复合材料(PB/AC)。通过场发射扫描电子显微镜、X-射线衍射、X-射线光电子能谱和傅立叶变换红外光谱技术,对PB/AC的形貌、结构和组成进行了表征。结果表明:立方体结构的PB微晶均匀地分布在活性炭表面。研究考察了PB/AC对水溶液中铯离子(Cs~+)的吸附和脱附性能。在pH=7、45℃和180 min条件下,PB/AC对Cs~+的最大吸附量为49.17 mg/g;在pH=2、45℃和240 min条件下,Cs~+的脱附率可达88.5%。  相似文献   

碳纤维布用于砖砌体抗震加固的试验研究   总被引：49，自引：1，他引：49  

赵彤  张晨军  谢剑  李浩菊 《地震工程与工程振动》2001,21(2):89-95

通过4片碳纤维布加固砖砌体在周期反复荷载作用下受力性能的试验，研究了粘贴碳纤维布来增强砖砌体抗震能力这种加固方法的有效性。本文研究了碳纤维布加固砖砌体的受力特性，分析了碳纤维布的用量以及贴布方式等因素对砖砌体抗震加固效果的影响。在此基础上，本文提出了碳纤维布加固砖砌体抗剪承载力的简化计算方法，可以满足实际工程设计的要求。  相似文献   

A SIMULATION OF CO_2 UPTAKE IN A THREE DIMENSIONAL OCEAN CARBON CYCLE MODEL     

金心  石广玉 《Acta Meteorologica Sinica》2001,(1)

A three-dimensional ocean carbon cycle model which is a general circulation model coupledwith simple biogeochemical processes is used to simulate CO_2 uptake by the ocean.The OGCMused is a modified version of the Geophysical Fluid Dynamics Laboratory modular ocean model(MOM2).The ocean chemistry and a simple ocean biota model are included.Principal variablesare total CO_2,alkalinity and phosphate.The vertical profile of POC flux observed by sedimenttraps is adopted,the rain ratio,a ratio of production rate of calcite against that of POC,and thebio-production efficiency should be 0.06 and 2 per year,separately.The uptake of anthropogenicCO_2 by the ocean is studied.Calculated oceanic uptake of anthropogenic CO_2 during the 1980s is2.05×10~(15)g(Pg)per year.The regional distributions of global oceanic CO_2 are discussed.  相似文献   

活性炭吸附分离—分光光度法测定硫化矿和土壤中的痕量铊   总被引：14，自引：0，他引：14  

吴惠明郭慧清  陈永亨陈银英　郑燕鹏 《岩矿测试》2001,20(4):275-278

详细研究并确定了在HCl介质中,活性炭吸附Tl及草酸铵解吸Tl的诸条件,使T1与干扰元素分离而预富集,回收率在99.6%～116.3%.以镉试剂2B为显色剂,准确测定了硫化矿和土壤中的Tl.考察了两个样品测定5次的相对标准偏差＜6%,试样分析结果与原子吸收法、等离子体质谱法及泡沫塑料吸附分离-镉试剂2B光度法结果基本一致.  相似文献   

土壤水溶性有机物吸着系数及其影响因素研究   总被引：1，自引：1，他引：1  

张甲珅  曹军  陶澍 《地理科学》2001,21(5):423-427

测定了中国中、东部地区17种土类45个表土样品中水溶性有机物的吸着系数、分子量分布、腐殖酸含量、粘土含量以及土壤pH值，分析了水溶性有机物吸着系数的分布、地域分异和影响吸着系数的主要因素。结果表明，中国中、东部主要天然土壤类型A层水溶性有机物吸着系数在0．0014－0．0284L/g，中位数为0．0062L/g；研究区吸着系数具有自北向南和自西向东递降的一般趋势。水热的地域分异是影响土壤A层Ks地域分异的根本因素，pH和WSOC分子量分布是直接影响Ks值的两个重要因素。  相似文献   

Late Quaternary Upwelling Intensity and East Asian Monsoon Forcing in the South China Sea     

Zhimin Jian  Baoqi Huang  Wolfgang Kuhnt  Hui-Ling Lin 《Quaternary Research》2001,55(3):363

Foraminifera from two cores off eastern Vietnam and the northwestern Philippines, where modern summer and winter monsoon-driven upwelling occurs in the South China Sea, respectively, were analyzed to evaluate the changes in paleoproductivity and upper water structure over the last 220,000 yr. We observed enhanced organic carbon flux and a shoaled thermocline when upwelling intensified off eastern Vietnam during interglacial ages and off the northwestern Philippines during glacial ages. This indicates that the East Asian summer monsoon increased while the winter monsoon decreased during interglacial ages. Particularly, the upwelling reached a maximum off eastern Vietnam during late marine isotopic stage (MIS) 5 and off the northwestern Philippines during MIS 2, implying that the summer monsoon decreased gradually since MIS 5 while the winter monsoon displayed an opposite trend. The variations in upwelling proxies exhibit a distinct cyclicity with frequencies near 41,000 yr and 23,000 yr off eastern Vietnam, in contrast to a strong frequency peak near 100,000 yr off the northwestern Philippines. We suggest that the East Asian summer monsoon has been forced by changes in solar insolation associated with precession and obliquity, while ice-volume forcing is probably a primary factor in determining the strength and timing of the East Asian winter monsoon but with less important insolation forcing.  相似文献   

南极普里兹湾及邻近海域二氧化碳的分布及其海气通量          下载免费PDF全文

张远辉  黄宣宝  王伟强 《极地研究》1997,9(2):79-83

本文根据１９９１年１２月至１９９２年１月在普里兹湾及其邻近海域所作的现场观测，采用红外分析法测定了表层水和大气ＣＯ２分压，结果表明，表层水ＰＣＯ２的分布大致呈近岸低、远岸高的特征，其分布变化主要受生物活动控制。利用通量计算模式，估算出ＣＯ２在调查海域的平均海－气通量为－７１．９ｇ／（ｍ２ａ），通量的可能误差主要来自与风速有关的交换系数。  相似文献